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| Registros recuperados: 204 | |
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| Trevisani,Nicole; Melo,Rita Carolina de; Bernardy,João Pedro Fossa; Pierre,Patrícia Maria Oliveira; Coimbra,Jefferson Luís Meirelles; Guidolin,Altamir Frederico. |
| Abstract The restricted genetic base in physalis in Southern Brazil is a challenge that requires genetic breeding for the achievement of fruits with superior agronomic quality. Therefore, genetic changes were induced in physalis for the selection of populations with superior fruit quality. To that end, seven populations of physalis were submitted to gamma irradiation (0,100 and 200 Grays – Gy), which provided 21 populations. Significant population difference was observed, which indicates the existence of variability between at least two populations of physalis. The contrasts showed difference for Colômbia01, Colômbia02, Caçador and CAV. The mutation induction was effective at causing genetic variations in these populations. For Colombia01 (100 Gy), it was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Small fruit; Gamma radiation; Cobalt60; Selection. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000300801 |
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| Gibson, John; McKenzie, David; Rohorua, Halahingano; Stillman, Steven. |
| Migration of workers from developing to developed countries and the resulting remittance flows are important development policies. World Bank calculations show that restrictions on international migration have larger welfare costs than the more widely studied restrictions on international trade. But estimated gains from migration may be affected by selection bias, with differences in outcomes for migrants and non-migrants reflecting unobserved differences in ability, skills, and motivation, rather than the act of moving itself. This poster illustrates this selection bias in commonly used statistical corrections for nonrandom selection. A unique survey conducted by the authors of Tongan migrants in New Zealand, and of non-migrants in Tonga is used. New... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Migration; Selection; Natural Experiment; Labor and Human Capital; 015; J61; F22; C93. |
| Ano: 2006 |
URL: http://purl.umn.edu/25704 |
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| Kalil Filho, Antonio Nascim; Hirano, Elcio; Sturion, José Alfredo; Sousa, Valderês Aaparecida de; Marzollo, Luiz Gustvo; Nicolotti, Filipe; Ukan, Daniele. |
| Exploitation of imbuya (Ocotea porosa) occurred at the same time of Araucaria angustifolia. Imbuya is threatned of extinction, owns a valuable wood and for these characteristics, Embrapa Florestas, located at Colombo, State of Paraná, Brazil, decided to make efforts for its conservation ex-situ. Collects in Southern Brazil at the localities of Caçador, Canoinhas (State of Santa Catarina), Colombo and Bocaiúva do Sul (State of Paraná) were realized. A complete randomized design was used in 12 months age seedlings. In this experiment, height of thirty one progenies ordered in plots of five plants with four replications was measured. The general mean for height was 16,55 cm. The additive genetic variance estimate was 72,03, the heritability coefficient... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Selection; Germplasm; Genetic gain; Genetic parameters; Breeding Seleção; Germoplasma; Ganhos genéticos; Parâmetros genéticos; Melhoramento. |
| Ano: 2004 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1591 |
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| Nassar,FS; El-Komy,EM; Abdou,AM. |
| ABSTRACT An experiment was conducted to evaluate the effect of selection for egg production performance of Cairo L-2 strain, as a local layer strain, after five generations of selection on productivity, ovarian morphology and some egg quality traits versus commercial Lohmann Brown-Lite (LBL) strain. The performance in the 5th generation was evaluated in Cairo L-2 and LBL strains for live body weight at sexual maturity (BWSM), age at sexual maturity (ASM), first egg weight (FEW), ovarian morphology, ovarian follicles number, ovarian weights and diameter, oviduct weight, liver weight, and stroma weight and their percentages to live body weight at sexual maturity for Cairo L-2 and LBL strains. Egg traits at 36 weeks of age including: egg number (EN), egg... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Egg production; Egg quality; Ovarian morphology; Selection; Sexual maturity. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000400683 |
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| Biassus,Igor de Oliveira; Cobuci,Jaime Araújo; Costa,Claudio Napolis; Rorato,Paulo Roberto Nogara; Braccini Neto,José; Cardoso,Leandro Lunardini. |
| Total numbers of 56,508, 35,091 and 8,326 records of milk, fat, and protein test-day yields, respectively, were used to estimate genetic parameters for six persistency measures on milk, fat and protein productions of Holstein cows reared in Minas Gerais state. Covariance components for additive genetic effects and permanent environmental effects were estimated by REML in random regression models using Legendre polynomials from the third to the sixth order. Overall, models with the highest orders of Legendre polynomials showed the best quality of adjustments of these productive records. Heritability estimates obtained by the models for persistence in milk, fat, and protein yields ranged from 0.04 to 0.32, from 0.00 to 0.23, and from 0.00 to 0.27,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic correlation; Heritability; Legendre polynomials; Random regression model; Selection. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001200009 |
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| Aguirre-Neira,Juan Carlos; Reis,Maurício Sedrez dos; Cardozo,Maritza Adelina Rojas; Raz,Lauren; Clement,Charles Roland. |
| Abstract Camu-camu (Myrciaria dubia, Myrtaceae) has the highest reported vitamin C concentrations of any native Amazonian fruit tree species, with increasing demand in domestic and international markets. With the goal of aiding management and conservation programs, we studied the diversity of camu-camu in cultivated and uncultivated areas, based on physicochemical characterization of the fruits. We evaluated 2,250 fruits from 87 plants from six localities of the Tarapacá district (Amazonas, Colombia) and from the Amazonian fruit germplasm bank of Agrosavia (Meta, Colombia). We found high physicochemical variability within and among localities, and superior fruits in the localities where non-cultivated plants were sampled, especially Pechiboy. Using... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tarapacá; Myrciaria dubia; Selection; Improvement. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000200801 |
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| Souza,Ana Raquel Ribeiro e; Miranda,Glauco Vieira; Pereira,Messias Gonzaga; Souza,Leandro Vagno de. |
| The objectives of this research were to evaluate the genetic variability and predict genetic gain in the white maize landrace rescued in Barbacena, Minas Gerais, Brazil. The Brazilian maize landraces have economic and social importance for certain areas in Brazil, and research on this germplasm is very important for local food security. Three experiments were carried out with 100 half-sib progenies, in Campos dos Goytacazes, RJ, Coimbra and Barbacena, Minas Gerais, Brazil. These sites were chosen for their soil and climatic differences. An analysis of variance was significant among the progeny for all characters, indicating the presence of genetic variability between the three populations. In Campos dos Goytacazes and Coimbra, the genetic variation of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Selection; Rescue; Breeding. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000100004 |
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| EUCLIDES FILHO, K.. |
| O instrumento mais simples que o melhorista tem, a sua disposição, para melhoria da produção de gado de corte e a seleção individual. Seleção nada mais e que o processo de escolha de indivíduos que serão pais na próxima geração. Esta escolha pode ser efetuada selecionando-se aqueles indivíduos superiores para a característica de interesse dentro do próprio rebanho, ou ainda, entre indivíduos provenientes de rebanhos diferentes. No primeiro caso, atenção especial deve ser dada no sentido de se evitar os problemas que surgem como resultado do aumento da consanguinidade. O sucesso desta seleção esta na dependência da qualidade e variabilidade genética, permitir, em muitos casos, a utilização de reprodutores melhores do que aqueles produzidos na própria... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Bovino de corte; Programa; Melhoramento genético; Selection; Program.; Seleção.; Breeding.; Beef cattle. |
| Ano: 1985 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/318187 |
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| Registros recuperados: 204 | |
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